I just ordered my pandora, all my reasons for wanting one have been mentioned. Things I wonder about: how pocketable it is, it's about 1cm thicker than my N770 (which it will replace, the n770 will be reduced to being the living room hifi remote, and then some) and likely a bit heaver due to the big battery.
I would love to see a Maemo Mapper equivalent app, vncviewer (which will happen for sure) a good audio/video player (including ogg) and FBreader. And FF3. Anything else (which is a big fat lot) is, to me, bonus.